mirror of https://github.com/encounter/SDL.git
Add support for Vita file API in SDL_rwops
This commit is contained in:
uyjulian
Sam Lantinga
parent
c8abc88cd0
commit
abcfb22b7d
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@ -45,6 +45,9 @@ extern "C" {
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#define SDL_RWOPS_JNIFILE 3U /**< Android asset */
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#define SDL_RWOPS_MEMORY 4U /**< Memory stream */
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#define SDL_RWOPS_MEMORY_RO 5U /**< Read-Only memory stream */
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#if defined(__VITA__)
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#define SDL_RWOPS_VITAFILE 6U /**< Vita file */
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#endif
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/**
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* This is the read/write operation structure -- very basic.
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@ -110,6 +113,17 @@ typedef struct SDL_RWops
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size_t left;
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} buffer;
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} windowsio;
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#elif defined(__VITA__)
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struct
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{
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int h;
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struct
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{
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void *data;
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size_t size;
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size_t left;
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} buffer;
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} vitaio;
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#endif
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#ifdef HAVE_STDIO_H
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@ -62,6 +62,236 @@
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#include "nacl_io/nacl_io.h"
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#endif
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#ifdef __VITA__
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#include <psp2/io/fcntl.h>
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#include <psp2/io/stat.h>
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#define READAHEAD_BUFFER_SIZE 1024
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static int SDLCALL
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vita_file_open(SDL_RWops * context, const char *filename, const char *mode)
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{
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int h;
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int open_flags;
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SDL_bool has_r;
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SDL_bool has_w;
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SDL_bool has_a;
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SDL_bool has_plus;
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if (!context)
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return -1; /* failed (invalid call) */
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context->hidden.vitaio.h = -1; /* mark this as unusable */
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context->hidden.vitaio.buffer.data = NULL;
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context->hidden.vitaio.buffer.size = 0;
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context->hidden.vitaio.buffer.left = 0;
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open_flags = 0;
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/* "r" = reading, file must exist */
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/* "w" = writing, truncate existing, file may not exist */
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/* "r+"= reading or writing, file must exist */
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/* "a" = writing, append file may not exist */
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/* "a+"= append + read, file may not exist */
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/* "w+" = read, write, truncate. file may not exist */
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has_r = SDL_strchr(mode, 'r') != NULL;
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has_w = SDL_strchr(mode, 'w') != NULL;
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has_a = SDL_strchr(mode, 'a') != NULL;
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has_plus = SDL_strchr(mode, '+') != NULL;
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if (has_plus)
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{
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if (has_r || has_w || has_a)
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{
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open_flags |= SCE_O_RDWR;
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}
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}
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else
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{
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if (has_r)
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{
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open_flags |= SCE_O_RDONLY;
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}
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if (has_w || has_a)
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{
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open_flags |= SCE_O_WRONLY;
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}
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}
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if (has_w || has_a)
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{
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open_flags |= SCE_O_CREAT;
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}
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if (has_w)
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{
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open_flags |= SCE_O_TRUNC;
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}
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if (has_a)
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{
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open_flags |= SCE_O_APPEND;
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}
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context->hidden.vitaio.buffer.data =
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(char *) SDL_malloc(READAHEAD_BUFFER_SIZE);
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if (!context->hidden.vitaio.buffer.data) {
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return SDL_OutOfMemory();
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}
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/* Try to open the file on the filesystem first */
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h = sceIoOpen(filename, open_flags, 0777);
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if (h < 0) {
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/* Try opening it from app0:/ container if it's a relative path */
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char path[4096];
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SDL_snprintf(path, 4096, "app0:/%s", filename);
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h = sceIoOpen(path, open_flags, 0777);
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}
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if (h < 0) {
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SDL_free(context->hidden.vitaio.buffer.data);
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context->hidden.vitaio.buffer.data = NULL;
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SDL_SetError("Couldn't open %s", filename);
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return -2; /* failed (sceIoOpen) */
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}
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context->hidden.vitaio.h = h;
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return 0; /* ok */
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}
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static Sint64 SDLCALL
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vita_file_size(SDL_RWops * context)
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{
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SceIoStat st;
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if (!context || context->hidden.vitaio.h < 0) {
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return SDL_SetError("vita_file_size: invalid context/file not opened");
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}
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if (sceIoGetstatByFd(context->hidden.vitaio.h, &st) < 0)
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{
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return SDL_SetError("vita_file_size: could not get file size");
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}
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return st.st_size;
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}
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static Sint64 SDLCALL
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vita_file_seek(SDL_RWops * context, Sint64 offset, int whence)
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{
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int vitawhence;
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if (!context || context->hidden.vitaio.h < 0) {
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return SDL_SetError("vita_file_seek: invalid context/file not opened");
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}
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/* FIXME: We may be able to satisfy the seek within buffered data */
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if (whence == RW_SEEK_CUR && context->hidden.vitaio.buffer.left) {
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offset -= (long)context->hidden.vitaio.buffer.left;
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}
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context->hidden.vitaio.buffer.left = 0;
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switch (whence) {
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case RW_SEEK_SET:
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vitawhence = SCE_SEEK_SET;
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break;
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case RW_SEEK_CUR:
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vitawhence = SCE_SEEK_CUR;
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break;
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case RW_SEEK_END:
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vitawhence = SCE_SEEK_END;
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break;
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default:
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return SDL_SetError("vita_file_seek: Unknown value for 'whence'");
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}
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return sceIoLseek(context->hidden.vitaio.h, offset, vitawhence);
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}
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static size_t SDLCALL
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vita_file_read(SDL_RWops * context, void *ptr, size_t size, size_t maxnum)
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{
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size_t total_need;
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size_t total_read = 0;
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size_t read_ahead;
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size_t byte_read;
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total_need = size * maxnum;
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if (!context || context->hidden.vitaio.h < 0
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|| !total_need)
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return 0;
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if (context->hidden.vitaio.buffer.left > 0) {
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void *data = (char *) context->hidden.vitaio.buffer.data +
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context->hidden.vitaio.buffer.size -
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context->hidden.vitaio.buffer.left;
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read_ahead =
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SDL_min(total_need, context->hidden.vitaio.buffer.left);
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SDL_memcpy(ptr, data, read_ahead);
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context->hidden.vitaio.buffer.left -= read_ahead;
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if (read_ahead == total_need) {
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return maxnum;
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}
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ptr = (char *) ptr + read_ahead;
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total_need -= read_ahead;
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total_read += read_ahead;
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}
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if (total_need < READAHEAD_BUFFER_SIZE) {
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byte_read = sceIoRead(context->hidden.vitaio.h, context->hidden.vitaio.buffer.data, READAHEAD_BUFFER_SIZE);
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read_ahead = SDL_min(total_need, (int) byte_read);
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SDL_memcpy(ptr, context->hidden.vitaio.buffer.data, read_ahead);
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context->hidden.vitaio.buffer.size = byte_read;
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context->hidden.vitaio.buffer.left = byte_read - read_ahead;
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total_read += read_ahead;
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} else {
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byte_read = sceIoRead(context->hidden.vitaio.h, ptr, total_need);
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total_read += byte_read;
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}
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return (total_read / size);
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}
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static size_t SDLCALL
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vita_file_write(SDL_RWops * context, const void *ptr, size_t size,
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size_t num)
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{
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size_t total_bytes;
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size_t byte_written;
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size_t nwritten;
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total_bytes = size * num;
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if (!context || context->hidden.vitaio.h < 0
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|| total_bytes <= 0 || !size)
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return 0;
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if (context->hidden.vitaio.buffer.left) {
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sceIoLseek(context->hidden.vitaio.h, -(SceOff)context->hidden.vitaio.buffer.left, SCE_SEEK_CUR);
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context->hidden.vitaio.buffer.left = 0;
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}
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byte_written = sceIoWrite(context->hidden.vitaio.h, ptr, total_bytes);
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nwritten = byte_written / size;
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return nwritten;
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}
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static int SDLCALL
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vita_file_close(SDL_RWops * context)
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{
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if (context) {
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if (context->hidden.vitaio.h >= 0) {
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sceIoClose(context->hidden.vitaio.h);
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context->hidden.vitaio.h = -1; /* to be sure */
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}
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SDL_free(context->hidden.vitaio.buffer.data);
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context->hidden.vitaio.buffer.data = NULL;
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SDL_FreeRW(context);
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}
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return 0;
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}
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#endif
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#ifdef __WIN32__
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/* Functions to read/write Win32 API file pointers */
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@ -590,22 +820,19 @@ SDL_RWFromFile(const char *file, const char *mode)
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rwops->close = windows_file_close;
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rwops->type = SDL_RWOPS_WINFILE;
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#elif defined(__VITA__)
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{
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/* Try to open the file on the filesystem first */
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FILE *fp = fopen(file, mode);
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if (fp) {
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return SDL_RWFromFP(fp, 1);
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} else {
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/* Try opening it from app0:/ container if it's a relative path */
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char path[4096];
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SDL_snprintf(path, 4096, "app0:/%s", file);
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fp = fopen(path, mode);
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if (fp) {
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return SDL_RWFromFP(fp, 1);
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}
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}
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SDL_SetError("Couldn't open %s", file);
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rwops = SDL_AllocRW();
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if (!rwops)
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return NULL; /* SDL_SetError already setup by SDL_AllocRW() */
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if (vita_file_open(rwops, file, mode) < 0) {
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SDL_FreeRW(rwops);
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return NULL;
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}
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rwops->size = vita_file_size;
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rwops->seek = vita_file_seek;
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rwops->read = vita_file_read;
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rwops->write = vita_file_write;
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rwops->close = vita_file_close;
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rwops->type = SDL_RWOPS_VITAFILE;
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#elif HAVE_STDIO_H
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{
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#ifdef __APPLE__
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